Time switch



May 7, 1940. H. H. ANDERSEN TIME SWITCH Filed Feb. 24,' 1939 Pima any 1,1940 Ylui'niirr OFFICE jrum swrron Herbert n. menen, Beverly, Man.,signor to General Electric Company, a corporation of New YorkApplication February 24, 193s, semi No. :sans

9 clammcl. zoo-ss) My invention relates to time switches audits primaryobject is to provide a time switch in which the levers used for settingthe time of operation of the switching mechanism are arl ranged to beconcentric to and indicate on a central clock dial in a practicable andsimple manner. Another feature is to employ a switchV controlling leverand certain stops against which it operates as a signaling switch. Aswitch of l the general type to which my invention is applied isdisclosed in United States Ratent No.

2,056,400, October 6, 1936. In said patent two rotary switch settingtime dials are provided separate from and in addition to an ordinaryclock dial. Where the switch is used as a range timer for controlling adomestic cooking range,

' for'example, the presence of the three dials, two

of which rotate, and the necessity of adjusting switch setting leverswith respect to the rotating dials becomes confusing to the ordinaryuser of such switches. According to my invention only one stationarynormal time-telling lclock dial is used for all of these time-tellingand time-adjusting purposes, and the switch setting levers are adjustedconcentrically about such dial in a straightforward simple manner thatmakes the desired adjustment a simple, Jreadily understood procedure.The main feature of my invention is in the machinsm which makes thissimplification possible without introducing other objectionablecomplications. j

Fig. 1 o! the drawing represents an exploded perspective view of thecomplete switch mechanism embodying my invention.- At the right in Fig.1 I have also represented a manual control vswitch and circuitconnections often used in conjunction ywith the type of time switchrepresented for convenience in shifting the automatic time controllinglfunction to different appliances and which is of assistance hereinexplaining the double contact arrangement of the time switch itself.Fig. 2 represents a front perspective view of the timer in its casing,

The time switch embodies a time-telling clock which is driven in thisinstance by a self-starting synchronous motor the stator of which isrepresented at I9, the eld winding at and a rotor enclosing gear casingat I2. The motor drives a minute hand shaft I3 through a gear train I4and a slip friction clutch I i, the clutch being provided to facilitatesetting of theclock hands. The minute hand I9 is secured to the forwardend of shaft I3 and is driven in a clockwise direction one revolutionper hour. The hour 89 hand I1 is secured to a hollow sleeve Ilconcentric with minute hand shaft I3 and is driven from shaft I3 throughback gears I9, 20, 2| and 22. The minute and hour hands cooperate with atwelve hour clock dial 23. It is thus seen that I have introduced nocomplications in the well s known simple form o f clock drivingmechanism The switch which istime controlled is represented as a doublepole switch having movable spring blades 24 and 25 cooperatingrespectively l0 with stationary contacts 26 and 21. The movable bladesare mechanically connected by an insulating post 28 secured throughswitch blade 24. The left or rear end of post 2B as here shown restsagainst a movable strip of insulating matel5 rial 29. insulating strip29 has its upper free end arranged to be moved to the right by the camaction of a lever 30 secured to a shaft 3|. In theposition shown, thehigh shoulder 32 of lever 30 pushes strip 29 to the right against thespring 20 tension of contact blades 24 and 25 and holds the switchcontacts open. This position of lever 30, may for convenience bereferred to as position I. If, now, lever 30 and its shaft 3| be rotatedcounter-clockwise to a position II, the low cam 25 surface at 33 will beopposite strip 29 and allow the strip together with post 28 andresilient contacts 24 vand 25 to move to the left to close the switch.Further rotation of lever 30 and shaft 3| to a position III will causeanother high 30 shoulder 34 to move strip 29 back tothe right an'd openthe switch again while still further rotation to a position IV willbring low part 35 Opposite strip 29 and allow the switch to close. Thefour positions of lever 30 just referred to 35 are approximatelyindicated by the dash lines labelled I, II, III, and IV. Lever 30 isurged to rotate in the counter-clockwise direction from position I toposition IV by a spring 36. I-Iowever, lever 30may be held in any one ofthe four 40 designated positions by stops or abutments 31, 33, 39 andthe lower part of strip 29 acting as an abutment.

Abutments 31 and 38 are parts of control levers 40 and 4| respectivelywhich levers are se- 45 cured on sleeves 42 and 43 respectively andpivot on shafts 44 and 49 respectively. These abutment levers 40 and 4|are normally held in the locking positions shown by a tension spring 49which is fastened between them. The action of 50 spring' 46 is such asto tend to rotate both levers in clockwise directions about their pivotpoints and against each other as shown with the abutment projections inlocking position with respect to the path of travel of the end of leverment levers are essentially alike and the parts for controlling abutment31 will now be described.

Sleeve 42 is fastened to a clutch part 49 which vhas clutch teeth, nerthan illustrated, cut in its near surface. A gear wheel 50 is rotatedcontinuously in a counter-clockwise direction at one revolution intwelve hours byv being geared to hollow hour hand shaft I8 through gear5l. Gear 59 is coaxial with clutch part 49 and rotates independentlythereof except when these parts are clutched together. Gear 50 has anopening near its periphery through which clutch fingers 52 extend towardand in alignment with the toothed side periphery of clutch part 49butnormally out of engagement therewith. These clutch flngersare a part ofa spring 53 riveted to the near side of gear 50 which spring is biasedto normally hold fingers 52 away from the clutch member 49. This springclutch nger structure also includes a cam-like projection 54 extendingaxially forward in line with the rearward extending.clutch fingers.AThis cam projection cooperates with the rounded rear end of a cam inger55 which is fastened to and extends to therear from a gear wheel 56. Camnger 55 is fastened near the periphery of,gear 56 and gear 55 has thesame axis of rotation of gear 58 so that once per revolution of gear 58the cam projection 54 comes against cam finger 55 and the former isforced to the rear while these parts pass each other. During this camaction teeth 52 are forced into engagement with the toothed surface ofclutch part 49 and cause sleeve 42 and the parts carried thereby torotate counter-clockwise with gear 50. When c am 54' has moved past pin55, spring 53 pulls teeth 52 from engagement with clutch part 49 and thelatter is released and it then rotates clockwise under tension of spring46 to again bring abutment 31 into position to block counterclockwiserotation of lever 39 past this point.

The time of day when the automatic operation just described is performeddepends upon the rotative position of pin 55 and this can be ad- .justdas desired by rotation of gear 55 which is in driving connection withsetting pointer 41 through sleeve 51 and gear wheel 58. Sleeve 51 isconcentric to hollow hour hand shaft i8 and to an intervening stationarysleeve H and is free to be rotated thereon. Pointer 41 is fastened tothe forward end and gear 58 lto the rear end of sleeve 51. The parts 49,D and 55 are all rotatively mounted about a post 44 parallel with shaftI3 independently of each other except as described above. Gear- 50rotates continuously, clutch part 42 rotates counter-clockwise a shortdistance when clutched to gear 58 and clockwise the same distance byspring 46 when released, and gear 56 is'rotated manually in a directionand extent determined -by the setting movement of setting pointer 41with respect to the regular clock dial 23. A friction spring part 59 orits equivalent is preferably provided to hold gear 55 stationary exceptwhen set manually. Parts 60 are merely spacing collars; .Y

The corresponding parts which are employed for setting the time ofrelease and for releasing arm 38 at abutment 38 are substantiallyduplicates of those parts which have been described and are identifiedby similar reference characters followed by the letter a. Setting gear58a is on a sleeve 51a which is slightly larger and surrounds sleeve 51.Hence sleeve 51 is longer than 51a. The gear 22 which drives gear 50a isone of the back gears between the minute and hour hand shafts. The gearshown at 6l meshing with gear 50a is on a shaft 62 extending forwardthrough the face 64 of the clock casing and is -provided with a suitablethumb piece 63 for setting the clock. This clock setting drive might beconnected'at any other convenient point in the time train. Forconvenience the principal gears in the central group which rotatecontinuously with the clock have arrows indicating their directions ofrotation.

In assembling the parts, pointer 41'is so rotatively positioned withrespect to parts 53 and 54, and pointer 48 is so rotatively positionedwith respect to par 55a and 54a, that the timesat which abutment stops31 and 38 are withdrawn Will be indicated by the position of pointers 41-and 48 on the clock dial 23, and this will also be consistentwith thetime indicated by hands l5 and I1 on the clock dial. It is further seenthat the direction of setting movement of pointer 41 about clock dial 23is correct with respect to the direction of movement of cam finger 53and the movement of continuously rotating cam part 54 past cam linger 55to bring this about. For example, pointer 41 is shown set to causewithdrawal of stop abutment 31 at about 1l oclock.

If pointer 41 is now moved counter-clockwise for v an earlier setting.,cam finger 55 is moved clockwise for a correspondingly earlier camoperation on cam 54. Normal setting of the clock hands also sets cams 54and 54a accordingly Aby the proper amount and in the proper direction sothat ,this does not interfere with the desired correlation arrangementfor subsequent correct operation. Setting pointers 41 and -48 may be setby movement in either clockwise or counter-clockwise direction. It isthus seen that the time is indicated and the time switch setting is madeall with respect to a single central stationary clock dial in its normalupright time-telling position. The time switch setting is thus madedirect, simple and convenient and can moreover be made with improvedaccuracy because the clock dial is made much larger than it ispracticable to make separate switch setting dials and at the same timekeep the dimensions of the device within reasonable The mechanism whichI have devised to accomplish this concentric time- .telling andswitch-setting arrangement is relatively simple, compact andinexpensive. The time switch setting and operating parts are properlycorrelated with the time as indicated by the clock hands on the sametime-tellingahd switch-seb ting dial and the only thing necessary forcorrect operation is to see that the clock is correct.

It will be noted that to permit free movement of setting pointers 41 and48 about the clock dial 23 and have these pointers extend from behind,around the outer edge and indicate on the front periphery of clock dial23, it is impossible to support the clock dial at its outer edge as iscustomary. The clock dial is therefore staked and supported at itscenter to the vforward end antonio of stationary sleeve IIb. I'he rearend fthis sleeveI is staked to and supported by a supplementary clockplate III. Stationary sleeve IIU surrounds the minute and hour handshafts I8 and I8 and is inside of sleeves i1 and 51a. All of these partsI3, I8, IIB, 51 and 51a are concentric, the shortest being on theoutside and the longest inside in order that the parts which rotate mayhave the necessary driving connecof setting pointers-41 and 48, and acircular open-4 ing is provided between the clock dial structure andcasing H3 in which setting pointers 41 and 48 are freely movable. I'hecomplete dial structure including the glass and rim II2 is supportedfrom the forward end of stationary sleeve IIII staked to the dial nearits Jcenter. Y

'I'he shafts on which setting knobs 68, 88 and 85 are mounted extendthrough small holes in the front of the casing and these lmobs areremovable `from their shafts in order that the cover casing may beremoved by withdrawing it from the front. I'he central dial assemblywhich is inde-l pendent of the casing is not disturbed when the casingis removed.

It has been explained how the stops 31 and 38 are automatically removedfrom the path of switch-operating arm 30 in accordance with time-settingof pointers 41 and 48. These stops are also arranged to be 4moved out ofthe path oi' arm 3U when it is rotated clockwise manually from positionIII to position I, for example. This manual movement of arm 30 in aclockwise direction simply rotates stop levers 40 and 4Icounterclockwise against the tension of spring 48 a sumcient amount toallow the end of lever 30 to clear the stop, afterA which they return tostop positions. 'I'his is analogous to an ordinary ratchet retractingoperation and is inherent in the arrangement. The stop 39 at the normalswitch open position III is also arranged to permit of clockwise manualrotation of arm 30 past it. For this purpose the stop 39 has a shoulder88 and is pivoted on its center to a pin 85 and is biased in theposition shown by a weight 88 resting on a stop $1. When so positionedonly the upper corner 39' of this stop projects into the path of theouter end of arm 88. It will thus hold the arm from rotation past thispoint in a counter-clockwise direction.v However, if arm 30 be movedpast this stop manually in a clockwise direction, it will rotate thestop counter-clockwiseI suillciently to allow the arm to passby the lowor fiat part of the .squared s top and then the stopl will rota back tothe position shown.

Arm 38 is rotated manually clockwise or cocked by means of the knob 88on the forward end' of shaft 3|. Such rotation also winds spring 88.Shaft 3| is normally urged endwise towards the handle 88 by this samespring 88 and, if rotated while in this forward position, it will engagethe various abutments in positions I, II and III past which it isrotated. However, the shaft II is arranged to have suillcient endwiseplay that inward pressure on handle 88 will move the shaft inward to apoint where if the arm 30 be rotated, it will clear the inside end ofthe various stops at positions I, II and III and move past withouttouching the stops. The arm 30 may thus be pressed in and cocked in casean abutment such as 38 happens to be clutched to gear 50a at the timethe arm 30 is manually rotated clockwise and is holding stop 38 againstquick retracting movement. Also, the arm may be manually released iromany one of the stops at positions I, II and III when resting at suchpositions, if that is! desirable, by simply pushing in on handle 88until the end of lever 30 clears the inner edge of the stops. The spring36 will then rotate the lever to the next position or to the ilnalposition IV, if pressure on the handle is not immediately relieved. i

If it is desired that the switch contacts 24, 26 and 25, 21 remainclosed with no automatic time switch operation, lever 30 is moved toposition IV.

.If it is desired that these switch contacts remain open with noautomatic time switch operation, lever 38 is positioned at position III.If it is desired that the switch be closed and later openedautomatically at a predetermined time, lever 30.

is cocked to position II and hand 48 is set at the time it is desiredthat the switch be opened. At such time stop 88 is temporarily retractedby the automatic time switch mechanism and allows arm '30 to 'rotate itposition III, thus opening the switch.

If it be desired that the switch be closed at a predetermined time andopened at a later predetermined time, lever 30 is cocked to position Iand lever 41 set at 'the time for the switch closing and. lever 48 setfor the time of switch opening. When stop 31 is temporarily Withdrawnautomatically in accordance with the time setting of lever 41, arm 3l!"rrotates from position I to position II and closes the switch. Then laterstop 88 is withdrawn temporarily in accordance with the time-setting ofpointer 48 and lever 30 rotates from position lI to position III to openthe switch. y

It is immaterial whether the cooking actionbe made before or after thesetting of levers 41 and 48 unless, of course, lever 41 be in such aposition thatit will release arm 30 in setting lever 41 to the newposition; Levers 41 and 48 may be rotated in either direction in settingthem and if desired may be positioned as to move past each otheralthough this is unnecessary. For example,

`with the pointers 41 and 48 in the positions shown, if it is desired tomove pointer 41 tothe opposite side of pointer 48, say to the one oclockposition, it may y done by simply rotating pointer 41 counter-clockwiseto such position. I

prei'er to mark lever 41 with a B and lever 48 with an E, designatingbeginning and ending of time period during which the switch will beclosed when set for automatic operation. Also the handle 88 may beprovided with a pointer 69 cooperating with a dial 10 having theimportant positions of lever 3|! designated in some suitable way. Forexample,v with lever cocked for li tton 89. Other appropriate markingsmay be used, supplemented with suitable instructions.

Forfurther convenience in using this switch I provide a smalllow-voltage signal lamp 1| which is lit when lever 88 is in either ofthe automatic operating positions I or Il but not otherwise.

Lamp 1| has an energizing circuit consisting of a low-voltagetransformer coil 12 on the stator Il of the electric-motor. The motorcoil acts as the primary of this transformer. One side of this circuitis grounded after going through the lamp to the metal part of the switchstructure as indicated at 18. The other side of coil 12 is connected toshaft 8| by wire 14. Shaft 8| and all metal parts connected thereto areinsulated from the rest of the clock structure except at the outer endof metal lever 88. Thus shaft 8| has insulated bearing bushings such asshown at 15.

When lever 88 rests on either metal stop 81 or 88 the circuit of lamp 1|is completed back through the metal grounded part of the switchstructure ras represented by the ground at 16.

At position III the lamp will not be lit sincel stop 88 is insulatedfrom the general metal structure of the clock. Hence the lamp serves asa warning when lit that the switch is set for automatic operation. c

As a further convenience to the housewife and cook I have provided asignal bell 18 operated by the timer mechanism by means of which thedesired ending of short cooking periods or other short time reminderperiods may be signaled. For this purpose a shaft 18 may be connected indriving relation with the timer motor through clutch 88, gear 8| andgear 82. Shaft 18 is movable endwise. It is biased forward by a spring88 which is also a bell clapper member and which bears against the rearend oi shaft 18. Near the front end of shaft 18 it has fastened to it aneccentric finger 84 and a pointer knob 85. Pointer knob indicates on aminute dial 88 and finger 84 cooperates with the front clock plate 84and in the zero minute indicating position of pointer 85, finger 84.registers with an opening 81 in the clock plate and in such positionwill enter, the opening under tension of 'me shaft 1s is thus heid 1nthis rearward position by reason of finger 84 bearing against the rearof plate 84. In such position gears 8| and 82 are in mesh and shaft 18is driven clockwise. in this case, at the rate of one revolution perhour. Spring 88 is under tension. In thirty minutes finger 84 willregister with opening 81, shaft 18 will quickly move forward, gear 8|will be -demeshed from gear 82 and the upper end of clapperspring 88will strike the bell, giving a signal. This mechanism then remains outof operation until reset by pushing in on knob 85 and turning it to theleft to the position desired. Shaft 18 may thus be turned when pushed tothe rear and gears 8| and 82 are in mesh by.:

. ample, suppose eggs boiled exactly four minutes are desired. The timerequired for the water to come toa boil is indefinite since it depends,.for

' example, on the original temperature of the water. As soon as thewater starts to boil, the

armario.

curancy in setting and timing. This signaling.

convenience, while operated by the same timing mechanism as the timeswitch and clock, does not interfere with their independent orsimultaneous operation, as will be more fully explainedi. A front viewappearance of this timer in its casing is represented in Fig. 2 and iscovered by Design Patent 110,906, August 16, 1938 to Patten. At theright in Fig. 1 I have shown a manual switch, the rotary operating shaftof which is designated by reference character 88 by means of which theautomatic time switch may be selectively connected to control a circuitthrough a switch 8|-, a convenience outlet 82 or a switch 88. Switch 8|is assumed to lead to a cooker and switch 88 to an oven to correspond tothe designations opposite pointer 84 on/shaft 88.

The supply circuit to the installation is a 220 volt circuit with aneutral wire 85 and it is assumed that the switches 8| and 88 aredesigned to connect the cooker and oven respectively for 220 voltoperation of their respective circuits. In the position of switch 88shown it connects theA cooker switch 8| to the supply circuit throughthe automatic time switch and switch 8| may be connected for -either or220 volt operation of its circuit and have that circuit controlled bythe time switch. At the same time, the circuit ,to the convenienceoutlet 82 is closed for 110 volt operation and the circuit to ovenswitch 88 is 'closed for manual operation of the oven circuit for 110lor 220 volt operation. Shaft 88 has on it five cams numbered 88 to |88and each of these cams controls a single pole, double throw contactmember cooperating with stationary contacts which for convenience may bereferred to as right and left contacts according to their disposition atthe right or left in the drawing.

Outside supply wire |8| does not go to any lbut that it goes directly toone side of the heater elements controlled by said switches. 'Iimingmotor coll is also permanently connected across neutral wire 85 andoutside wire |8| for 110 volt operation and hence runs continuously.

. jAlso the circuit of signal lamp 1| which receives energy through themotor is independent of :any .of thevswitches mentioned.

Viith the switch 88 connected as shown for automaticcontrol of thecircuit through switch 8| a circuit is closed from wire |8I, circuit 8|,wire |88, right contact' 81 of switch 88, time switch contacts 25 and 21to outside wire |82. Hence if switch 8| is connected for 220 voltoperation, it' will be controlled by the time switch. Another circuit isconnected from wire |8| to .switch 8| back -through wire |84, leftcontact 88 v0i' switch 88, contacts 28 and 24 -of the time tion fromwire |0|, wire |05, right contact 99 to neutral wire 95. The 110 voltcircuit to switch 93 is closed from 'wire |0|, right contact |00 ofswitch 90 to the neutral wire 95 and the 220 volt circuit is closed toswitch 90 from wire |0|, wire |09, lett switch contact 99 to outsidesupply wire If, now, switch 90 be rotated 90 degrees counter-clockwisefor automatic. time switch operation to outlet 92, the latter will beconnected from wire |0|, wire |05, left contact 99, time switch contacts29 and 24 to neutral wire 95. At this time a 110 volt circuit is closedto switch 9| from wire |0l, wire |09, right contact 99 to neutral 95 anda 220 volt circuit is connected from wire |0|. wire |09-, left contact91 to wire |02.

Y At this time also a 110 volt circuit is connected to switch 93 fromwire |0|, right switch contact |00 to neutral wire 95 and a 220 voltcircuit is connected through wire |0|, wire |09, left contact 99 to wire|02. l

If, now, switch be turned 90 degrees 'f urther counter-clockwise,ovenswitch 99 is connected for time switch control, the 220 volt circuitbeing from wire |0|, wire |09, right contact 99, time switch contacts 25and 21 to outside wire |02 and the 110 volt circuit being from wire |0|left contact |00, time switch/contacts 29l and 24 to neutral wire 95. Atthis time outlet 92 is connected for 110 volt operation from wire |0I,wire |05, right contact 90 to neutral Wirel 95. Also 110 and 220 voltcircuits are connected to switch 9|,

the'110 volt circuit being from wire |0| wire"|0l,.

right contact 99 to neutral and the 220 volt circuit from wire |0|, wire|09, lett contact 91 to wire |02. y

When switch 90 is turned to the designation Nonautdnone of the circuitsto 9|, 92 or 93 go through the time switch contacts but all are-nevertheless energized, switches 9| and 93 for either 110 or 220 voltoperation. The 110 volt circuit for switch 9| is from wire |0|, wire|00, right contact` 99 to neutral and the 220 volt circuit through wirel03, left contact 91 to wire |02. The 110 volt circuit to outlet 92 isthrough wire |05, right contact 99 to neutral.

AThe 110 volt circuit to switch 93 is through right Contact |00 toneutral and the 220 volt cirlcuit`is through wire |06, left contact tooutside The need for two independent circuits through the time switch isthus explained. These circuits at the time switch contacts should bewell insulated from each other, as illustrated, and so arranged thatregardless of which circuit therethrough is being used, the time switchsetting procedure is the same i'for both.

It is also seen how the signal bell timer feature may be of considerableconvenience in timing a cooking operation on one circuit while the timeswitch is in use controlling another of the circuits described. V

What I claim as new and desire to secure by Letters Patent of the UnitedStates is:

1. A timer comprising a clock dial, clock hands cooperating with saiddial, minute and hour hand shafts, a motor .for driving said shafts, aswitch, a pair of means driven from said hour hand shaft for controllingdifferent operations of said switch, J a pair of adjustable means fordetermining the times of operation of said controlling means on saidswitch, said adjustable means including a pair of pointers independentlyadjustable about said clock dial and a pair o! rotatable sleeves outsideand concentric to said minute and hour hand shafts and to which saidpointers are secured, and a stationary sleeve between said shafts andpair of sleeves and concentric thereto i'or supporting said clock dialfrom its central position, said pointers extending from the rear aboutthe outer edge of said clock dial tto indicate on` the front peripherythereof.

2. A timer comprising a clock dial, minute and hour hands indicating onsaid dial, minute and hour hand shafts, a timer motor for driving saidshafts and hands, a'switch,v a rotary lever for operating said switch,said lever having a rotary positon where the switch is open and adiierent rotary position where-the switch is closed, manually woundspring means for urging said lever to rotate through said positions,stops for said lever at said positions, a pair of means driven from saidhour hand shaft for temporarily removing said stops to permit rotationof said lever through f j said positions, a pair of independentlyadjustable means for .determining when said stops shall be removed,including sleeves concentric to and rotatable about said shafts,pointers secured to said sleevesand independently adjustable about saidclock dial to indicate thereon when said switch shall clbse'and open bythe removal of said stops, and a stationary sleeve between said pair ofsleeves and said tshafts lfor supporting said clock dial near itscenter, said shafts extending through the center of said clock dial andsaid pointers extending from the rear about the outer edge of 'saidclock dial to indicate on the front periphery thereof. v

3. In a timer, the combination ofcontact apparatus, a control membergoverning said contact apparatus, said control member being adapted to be moved from a normal position to a set position, means normally tendingto cause a unidirectional dreturn motion to said control member fromsaid set position bacl'r to said normal position, a movable stop biasedto a stopping position at a point in-th'e path of such return movement,time re-` sponsive driving means for actuating said stop to release saidcontrol member, said drivingmeans `including a normally disengagedclutch, cam

means for temporarily engaging said clutch to cause said tripping stopto release said control member, and means for adjusting said cam meansto release said tripping means at a predetermined time. f

A4. In a timer, a switch, a lever for operating said switch adapted tobe moved from a normal position to a set position, ,means normallytending to cause a unidirectional return of said lever from a setposition ,back to said normal position, a pair of movable stops biasedto stopping positions at different points in the path .of such returnmovement, a timer motor, a pair' of driving connections between saidtimer motor and movable stops, each connection including a normallydisengaged clutch, a pair of cam `means a cocked position, a movablestop normally biased into the path of the return movement of\said leverto hold it in cocked position, a timer motor, s

against the clutch surface of said wheel to engageI said clutch and movethe stop to release said lever comprising a second cam extending intothe path of rotation of said first mentioned cam and adjustable aboutthe axis of rotation of said gear wheel to select the time when saidlever shall be released.

6. In a timer, a clock dial, a support, a sta tionary sleeve fastened atits rear end to said support and secured at its frontend to the centralportion of said dial and comprising the sole support for said dial,minute and hour hands indicating on the front of said dial, minute and'hour hand shafts extending through said stationary sleeve and supportingsaid hands on their forward ends, a timing motor and gear train fordriving said shafts located to the rear of said stationary sleeve andits support, switching mechanism, means operated from said gear trainfor operating said switching mechanism, and rotary adjustable means foradjusting and indicating the time at .which said switch shall beoperated, said means including a hollowA shaft supported on saidstationary sleeve and having a pointer extending radially fromtheforward end of said hollow shaft back of said dial to its peripheryand around the edge thereof to indicate on the front of said dial.

7. In a timer, a clock dial, a support, a fixed hollow sleeve secured atits rear end in said support and secured at its forward end to thecentral portion of said dial and constituting the sole support for saiddial, minute and hour hands indicating on the front of said dial, minuteand hour hand shafts extending through said hollow sleeve and dial, atimer motor and a gear train located to the rear of said hollow sleeve'for driv` ing said shafts, a switch, means controlled by said motor forclosing said switch and means controlled by said motor for opening saidswitch,

said control means including continuously rotary parts geared to thehour hand shaft to the rear of said stationary sleeve and normallystationary adjustable rotary parts cooperating with the continuouslyrotating parts for determining the time at which said switch operationsshall occur, said adjustable parts being geared to and including hollowsleeves concentrically and independently rotatively mounted on saidiixed hollow sleeve and pointers indicating on the front periphery ofsaid clock dial secured to said last mentioned hollow 'sleeves toindicate'the time of occurrence of said switching operations.

8. In a timer, a switch, a metallic rotary lever for operating saidswitch, said lever having different rotaryl switch controlling positionsin -which it may be set, movable metallic stops for positioning saidlever in said different switch controlling pomtions, time controlledmeans for.

comprising a stationary twelve-hour clock dial,

minute and hour hands indicating on the front of said dial, minute andhour hand shafts extending from the rear through said dial at its centerfor driving said hands, automatic operation time adjusting leversindicatingon and independently adjustable about the front periphery ofsaid dial, hollow shafts concentric with said minute and hour handshafts and surrounding them to which said adjusting levers are securedbehindlsaid dial and a fixed hollow sleeve outside of the minute andhour hand shafts and inside of said hollowshafts comprising the solesupport of said dial, said dial being secured near its center to thei'ront end o'f said fixed hollow sleeve.

. I-mRBERT H. ANDERSEN.

